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Functional maturation of rat trigeminal nerve.
1Laboratoire de Physiologie, Faculté de Médecine Pitié-Salpêtrière et Centre de Recherche Neurophysiologiques de l'INSERM, Prof. J. Scherrer, 91 Boulevard de l'Hôpital, 75634 Paris Cedex 13 France.
Neuroscience Letters
|July 17, 2009
Summary
The rat trigeminal nerve matures postnatally, showing ongoing sensory nerve activity that decreases with age. This activity, originating locally, impacts nerve function and can be reduced by cooling.
Area of Science:
- Neuroscience
- Developmental Biology
- Physiology
Background:
- The trigeminal nerve plays a crucial role in sensory processing.
- Understanding nerve maturation is key to comprehending sensory system development.
Purpose of the Study:
- To investigate the postnatal maturation of the rat maxillary trigeminal nerve.
- To characterize the ongoing neural activity in this developing sensory nerve.
Main Methods:
- Electrophysiological recordings using microelectrodes to assess activated axons, conduction velocities, and recovery periods.
- Experimental manipulation including peripheral sensory deprivation and nerve cooling.
Main Results:
- Maxillary nerve maturation extends beyond the third postnatal week.
- An endogenous, ongoing neural activity was detected in the maturing nerve, decreasing with age.
- This activity was resistant to sensory deprivation but suppressed by cooling, affecting nerve function.
Conclusions:
- Rat trigeminal nerve maturation is a prolonged postnatal process.
- The detected endogenous activity in the trigeminal nerve is a significant finding in sensory nerve development.
- Nerve cooling affects functional capabilities, highlighting the role of ongoing activity.
